Floating boxes appear to have no title or border on a guide. If you do this for all boxes on a single-column page (except for your profile box), the page will look more like a typical website, which can be useful for some types of content.
Because a floating box's title is not known to the user:
<h2>
if you're using headings, so users will still have a proper page structure for meaning and navigation (see Headings). This is tricky because there is no Heading 2 option in the Format dropdown menu, so here is the workaround:Reference: WCAG Success Criterion 1.3.1 (Level A): Info and Relationships
Tabbed boxes in Libguides used to be inaccessible. That is no longer the case; however, the old tabbed boxes are still on older guides, so you'll need to replace them.
To use a tabbed box correctly:
<tablist>
element and the title of your box is the list label.Do not include a slide title if you want to make one of the images a link. LibGuides creates two separate links rather than combining the two, which is confusing for accessibility. Instead, add a title as a heading (level 3) in the rich text editor as a workaround.
Also, if you make one of the images a link, remember that alt text for images that function as a hyperlink should always describe the link destination and never the image itself.
Reference: Web Accessibility Initiative (WAI) functional images tutorial. WAI writes WCAG.